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 MIL-HDBK-1023/4
Table 20
Preventive Maintenance Inspection Schedule for
Illuminated Signs
D
W
M
B
S
A
U
A
K
T
I
M
N
N
Maintenance requirement
I
L
H
M
A
N
S
L
Y
L
H
N
L
C
Y
Y
Y
Y
Y
H
1.
Check operation of lamps.
X
2.
Check cleanliness of sign faces.
X
3.
Check for mechanical damage or misaligned
X
parts.
4.
Check operation of interlocks.
X
5.
Check for vegetation around lights.
X
6.
Check internally for cleanliness and moisture.
X
7.
Check electrical connections.
X
8.
Check and clean drain holes.
X
9.
Check lamp current.
X
10.
Check frangible coupling mounts.
X
11.
Check insulation resistance of cable.
X
12.
Check resistance of grounding system.
X
13.
Check need for painting.
X
5.15.2
Lighting System Control Points. At airfields and heliports there normally will be two
points of control for the lighting system. The primary point of control will be in the operations
room of the control tower. The alternate (secondary) point of control will be located in the
equipment vault unless specifically directed or approved location elsewhere.
5.15.3
Maintenance Responsibility. The responsibility for maintaining lighting control panels
varies at DOD facilities such as the Directorate of Public Works (DPW), Ground Electronics
Group, or Base Civil Engineering (BCE), either using in-house personnel or by contract.
80
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